--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwtx/jface/text/link/LinkedPosition.d	Sat Aug 23 19:10:48 2008 +0200
@@ -0,0 +1,182 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2006 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module dwtx.jface.text.link.LinkedPosition;
+
+import dwt.dwthelper.utils;
+
+
+import dwtx.core.runtime.Assert;
+import dwtx.jface.text.BadLocationException;
+import dwtx.jface.text.DocumentEvent;
+import dwtx.jface.text.IDocument;
+import dwtx.jface.text.Position;
+
+/**
+ * A <code>Position</code> on a document that knows which document it is
+ * registered with and has a sequence number for tab stops.
+ * <p>
+ * Clients may extend this class.
+ * </p>
+ * @since 3.0
+ */
+public class LinkedPosition : Position {
+
+    /** The document this position belongs to. */
+    private IDocument fDocument;
+    private int fSequenceNumber;
+
+    /**
+     * Creates a new instance.
+     *
+     * @param document the document
+     * @param offset the offset of the position
+     * @param length the length of the position
+     * @param sequence the iteration sequence rank
+     */
+    public LinkedPosition(IDocument document, int offset, int length, int sequence) {
+        super(offset, length);
+        Assert.isNotNull(document);
+        fDocument= document;
+        fSequenceNumber= sequence;
+    }
+
+    /**
+     * Creates a new instance. Equivalent to calling
+     * <code>LinkedPosition(document, offset, length, LinkedPositionGroup.NO_STOP)</code>
+     *
+     * @param document the document
+     * @param offset the offset of the position
+     * @param length the length of the position
+     */
+    public LinkedPosition(IDocument document, int offset, int length) {
+        this(document, offset, length, LinkedPositionGroup.NO_STOP);
+    }
+
+    /**
+     * @return Returns the document.
+     */
+    public IDocument getDocument() {
+        return fDocument;
+    }
+
+    /*
+     * @see dwtx.jface.text.Position#equals(java.lang.Object)
+     */
+    public bool equals(Object other) {
+        if (other instanceof LinkedPosition) {
+            LinkedPosition p= (LinkedPosition) other;
+            return p.offset is offset && p.length is length && p.fDocument is fDocument;
+        }
+        return false;
+    }
+
+    /**
+     * Returns whether this position overlaps with <code>position</code>.
+     *
+     * @param position the position to check.
+     * @return <code>true</code> if this position overlaps with
+     *         <code>position</code>,<code>false</code> otherwise
+     */
+    public bool overlapsWith(LinkedPosition position) {
+        return position.getDocument() is fDocument && overlapsWith(position.getOffset(), position.getLength());
+    }
+
+    /**
+     * Returns whether this position includes <code>event</code>.
+     *
+     * @param event the event to check.
+     * @return <code>true</code> if this position includes <code>event</code>,
+     *         <code>false</code> otherwise
+     */
+    public bool includes(DocumentEvent event) {
+        return includes(event.getDocument(), event.getOffset(), event.getLength());
+    }
+
+    /**
+     * Returns whether this position includes <code>position</code>.
+     *
+     * @param position the position to check.
+     * @return <code>true</code> if this position includes
+     *         <code>position</code>,<code>false</code> otherwise
+     */
+    public bool includes(LinkedPosition position) {
+        return includes(position.getDocument(), position.getOffset(), position.getLength());
+    }
+
+    /**
+     * Overrides {@link Position#includes(int)}so every offset is considered
+     * included that lies in between the first and last offset of this position,
+     * and offsets that are right at the end of the position.
+     *
+     * @param pOffset the offset to check
+     * @return <code>true</code> if <code>pOffset</code> is in
+     *         <code>[offset, offset + length]</code>
+     */
+    public bool includes(int pOffset) {
+        return this.offset <= pOffset && pOffset <= this.offset + this.length;
+    }
+
+    /**
+     * Returns whether this position includes the range given by
+     * <code>offset</code> and <code>length</code>. A range is included by
+     * a <code>LinkedPosition</code> if {@link #includes(int) includes(offset)}
+     * returns true for every offset in the range, including the borders of the
+     * range.
+     *
+     * @param doc the document that the given range refers to, may be <code>null</code>
+     * @param off the offset of the range, referring to <code>document</code>
+     * @param len the length of the range
+     * @return <code>true</code> if <code>doc</code> is the same document as
+     *         this position refers to, and if the entire range is included in
+     *         this position
+     */
+    protected bool includes(IDocument doc, int off, int len) {
+        return doc is fDocument && off >= offset && len + off <= offset + length;
+
+    }
+
+    /**
+     * Returns the content of this position on the referenced document.
+     *
+     * @return the content of the document at this position
+     * @throws BadLocationException if the position is not valid
+     */
+    public String getContent() throws BadLocationException {
+        return fDocument.get(offset, length);
+    }
+
+    /**
+     * Returns the sequence number of this position.
+     *
+     * @return the sequence number of this position
+     */
+    public int getSequenceNumber() {
+        return fSequenceNumber;
+    }
+
+    /**
+     * Sets the sequence number of this position.
+     *
+     * @param sequence the new sequence number
+     */
+    public void setSequenceNumber(int sequence) {
+        fSequenceNumber= sequence;
+    }
+
+    /*
+     * @see dwtx.jface.text.Position#hashCode()
+     */
+    public int hashCode() {
+        return fDocument.hashCode() | super.hashCode() | fSequenceNumber;
+    }
+}